They are currently hidden as 'technical items', this needs to be switched off.

Note unity-lens-gwibber will also hopefully become default lenses this cycle.

2. Add graphical assets to represent the Lenses in the Software Center. A icon for each Lens is available, and screenshots with the default wallpaper also need to be attached to each Lens.

3. All other Lenses currently listed in the software centre should also be added to this "Dash Search Plugins" category inside 'Themes & tweaks'. Note that there are quite a number of 3rd party Lenses that need to be categorised in this way.

4. All scopes should be listed as 'add-ons' for specific Lenses, e.g. unity-scope-musicstores should be a add-on for the Music Lens. Double check that all scopes are correctly listed as add-ons, and none are visible in the "Dash Search Plugins" category.

5. Check that a user can both install and un-install all of these Lenses and Scopes, including those shipped by default.

This functionality in Unity is now fully provided by the Smart Scopes feature, available since unity 7.1. Selecting the Applications lens and the Search Plugins filter will display all search plugins available (local or through the Software Centre).